142597-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142597-20-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,5,9 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 142597-20:
(8*1)+(7*4)+(6*2)+(5*5)+(4*9)+(3*7)+(2*2)+(1*0)=134
134 % 10 = 4
So 142597-20-4 is a valid CAS Registry Number.
142597-20-4Relevant articles and documents
Synthesis and Amino Acid Chain Extension of 1-Acylated Hydroxymethylpyrroles
Abell, Andrew D.,Litten, J. Christopher
, p. 1473 - 1484 (2007/10/02)
Acylation of pyrrole-2-carbaldehyde (3) with an N-phthaloyl amino acid chloride, N,N-diisopropylethylamine and 4-dimethylaminopyridine (dmap) gave the 1-acylpyrrole-2-carbaldehydes (4a-c).The 1-acylated pyrroles (4d-i), (8) and (9) were similarly prepared